In the 1990s, Redfield was investigated for misrepresenting data to promote an AIDS vaccine that he was connected with. Earlier in his career, Redfield also advocated for policies like mandatory patient testing for HIV, and for segregating HIV-positive soldiers from the rest of the Army.

“This pattern of ethically and morally questionable behavior leads me to seriously question whether Dr. Redfield is qualified to be the federal government’s chief advocate and spokesman for public health,” Murray wrote.